CONSPECTUS:With the development of nanotechnology and characterization techniques,it has been realized that the reactivity of metal nanoparticles mainly depends on some unsaturated coordination atoms on the ***,only a...
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CONSPECTUS:With the development of nanotechnology and characterization techniques,it has been realized that the reactivity of metal nanoparticles mainly depends on some unsaturated coordination atoms on the ***,only a small fraction of the surface exposed atoms can access the reactants and act as reactive sites,resulting in low utilization of metal ***,due to the complex structure of metal nanoparticles,the metal atoms exposed on the surface are likely to be in different chemical environments and may act as multiple active centers to catalyze the reactants,which brings great difficulties in the establishment of the structure−activity relationship of metal nanoparticles.
As electric vehicle (EV) technology matures, the need for compact and efficient power electronics will continue to grow. To increase power density and efficiency, it is ideal to minimize the size and power loss of com...
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ISBN:
(数字)9798331516116
ISBN:
(纸本)9798331516123
As electric vehicle (EV) technology matures, the need for compact and efficient power electronics will continue to grow. To increase power density and efficiency, it is ideal to minimize the size and power loss of components, including inductors. A standard inductor design technique is placing an air gap in the magnetic core, allowing designers to tune the inductance and allow higher levels of magnetic field without saturation. The inclusion of gaps can increase the total magnetic core loss beyond those predicted by common models such as the Steinmetz equation, creating the need for accurate gap loss models. In this study, the losses of a nanocrystalline inductor core are experimentally measured and compared to an existing gap loss model, showing significant agreement with predicted values. The model was then integrated into a multi-objective optimization framework to evaluate the fitness of nanocrystalline cores against ferrite cores at different switching frequencies. This work finds that gap losses can increase the total loss of nanocrystalline inductors by up to an order of magnitude as frequency increases, implying that consideration of gap losses is vital to selecting the appropriate core material for design applications.
The solar energy industryIndustryisCircular economy one of the fastest growing industriesIndustry in the world. The industryIndustry faces significant challenges due to a lack of effective end-of-life (EOL) management...
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One of the key aspects for the successful implementation of electric vehicles (EVs) is a fast and convenient way to recharge the batteries. Currently, there are two solutions (i) a battery swapping station (BSS);and (...
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Dyes are substances that enhance the appearance of finished goods by providing uniform colour. Dyeing is the application process of dyes that are fixed in textile fibers. The dyeing process uses various steps, includi...
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Ta-based materials have gained significant interest for bioimplantable scaffolds because of their appropriate mechanical characteristics and *** overcome the serious limitation of bioinertness,there have been many eff...
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Ta-based materials have gained significant interest for bioimplantable scaffolds because of their appropriate mechanical characteristics and *** overcome the serious limitation of bioinertness,there have been many efforts to enhance the bioactivity and osseointegration of Ta-based scaffolds through morphostructural and surface *** scaffolds are implantable devices,sufficient bioactivity is needed to trigger the cellular functions required for tissue ***,a combination of materials and bioscience is needed to develop efficient Ta-based scaffolds,although reviews of this interdisciplinary field remain *** review aims to provide an overview of the main strategies to enhance the bioactivity of Ta-based scaffolds,describing the basic mechanisms and research methods of osseointegration,and the approaches to enhance bioactivity and *** approaches are divided into three main sections:(i)alteration of the micromorphology,(ii)customization of the scaffold structure,and(iii)functionalization modifications(through alloying or the addition of surface coatings).Also provided are recent advances regarding biocompatibility assessment in vitro,osseointegration properties in vivo,and clinical trial results.
Various obstacles[poor tissue penetration,hypoxic tumor microenvironment,and reactive oxygen species(ROS)production quenching due to aggregation]obstruct imaging-guided high-efficiency phototherapy targeting ***,nanop...
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Various obstacles[poor tissue penetration,hypoxic tumor microenvironment,and reactive oxygen species(ROS)production quenching due to aggregation]obstruct imaging-guided high-efficiency phototherapy targeting ***,nanophthalocyanine(ZnPcN4-TF)is elaborately designed based on a synthetic phthalocyanine derivative(ZnPcN4)and nonimmunogenic transferrin(TF)through multiple noncovalent interactions for photoacoustic(PA)imaging-guided *** conjugating electron-rich amino groups effectively suppressed fluorescence and ROS generation due to the strong photoinduced electron transfer effect,ZnPcN4 became an ideal photothermal and PA imaging ***4-TF not only effectively targeted tumor sites and accumulated there,but also,surprisingly,facilitated the enhancement of ROS production via a type I process in an aggregate compared to ZnPcN4 itself,potentially due to accelerated electron ***,ZnPcN4-TF had a substantially more powerful photothermal effect than ZnPcN4 ***,this design effectively overcomes the obstacles to photodynamic therapy(aggregation-related ROS generation quenching in a hypoxic environment).Furthermore,PA imaging solves the tissue penetration challenge in optical *** study provides a broader base for designing novel photosensitizers to improve phototherapy under hypoxia.
Polyetheretherketone (PEEK) is a polymer widely used for artificial bone implants but exhibits a low affinity for bone tissue and lacks osteoconductivity and osseointegration. Because strontium (Sr) is known to enhanc...
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As a typical nonlinear magnetoresistance, unidirectional magnetoresistance (UMR) has recently been observed in antiferromagnetic (AFM) systems with canted spin structure. However, a profound understanding of AFM UMR i...
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As a typical nonlinear magnetoresistance, unidirectional magnetoresistance (UMR) has recently been observed in antiferromagnetic (AFM) systems with canted spin structure. However, a profound understanding of AFM UMR induced by interfacial spin-orbit coupling (SOC) is still lacking to date. In this paper, we choose van der Waals canted antiferromagnetic CrPS4 due to the relatively low magnetic anisotropy and weak interlayer coupling, which enables a canted-AFM state between two adjacent layers under an in-plane magnetic field, and systematically investigate SOC-induced AFM UMR in CrPS4/Pt heterostructure. We experimentally observe two characteristic UMR tendencies versus magnetic field in CrPS4/Pt devices. The different UMR tendencies may be attributed to the interfacial defect-induced Fermi level change, which is supported by density-functional theory calculations and Boltzmann transport formalism. Our work provides a more profound understanding of the nontrivial AFM UMR and may facilitate the development of two-dimensional AFM spintronic devices.
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